Underwear on Backwards

So yesterday, most of the day, my underwear(white cotton boxer briefs) seemed to be particularly troublesome for me...."things" were just not sitting right and I was constantly making adjustments.  Last night as we were beginning to wind down for the evening, I went in the bathroom to shower and my son needed my attention in his bedroom for a minute....so I went in with just my boxer-briefs on..no big deal, we see each other in our underwear all the time...it is just us guys so no biggie.  Anyway, I answer his question and as I am leaving the room he inquires "Why are you wearing your underwear backwards?"  I looked and sure enough....they were on backwards!  I laughed and told him I had them that way all day and never noticed.  He laughed and said, I wear them that way when I havent changed into new ones in a few days!!!!!!!!!!!  I left the room feeling like a failure as a father!!  So now we have underwear checks in the morning....mine to make sure they are on properly and his to make sure they are fresh and clean!!!